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20130121
20130129
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LINKTV 3
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LINKTV
Jan 28, 2013 2:00pm PST
. the alaska lands act was passed by the house in 1979, by the senate in 1980, and signed into law by president carter. with a stroke of his pen, the president doubled the national park system, the nation's wilderness areas, and our wildlife refuges and closed the door on mineral development on these lands. the economic cost of the alaskan lands act is measured in terms of the ress5rces we chose not to develop-- the minerals that still lie beneath the permafrost. was it worth it? we asked economic analyst richard gill what the alaskan lands issue tells us about economic questions in general. the alaskan lands issue is an issue of limits. one limit relates to economics. what is the value to society of preserving our natural wilderness? economists will have personal views. we can make no claim to special wisdom. this question is for society to decide. having been appropriately modest, we can now ask what economists can do. the first lesson of economics is that we can't have everything we want. our desires for material goods may be unlimited. our resources for fulfilling those desires are limited
LINKTV
Jan 25, 2013 2:00pm PST
meaning and role differ from culture to culture. but the physical laws of sound are universal. at the root of all sound is vibration. [bell tolling] not only the root of all music is vibration, but in some sense, perhaps, the root of everything is vibration. everything is moving all the time. the earth is moving. the sun is moving. on the earth, the waves are beating against the shore. everything which is, is vibration. in order to have a sound, you need a physical object which vibrates, whether it's a cello or a speaker in a radio, you need a medium to carry that vibration. typically, it's air, and finally we need an ear, an ear drum, and a brain to turn it into something that's meaningful to a human being. [flute plays] the simplest sort of sound is called a sine wave, and i can display that sound on an oscilloscope. of course in nature, nothing is so simple as that. there isn't just one sine wave happening at one moment. actually, there are many sine waves all adding and subtracting. when you listen to a sound, when you listen to a musical note, you hear several things. [flute music con
LINKTV
Jan 26, 2013 6:00am PST
and its reliance on islamic law and the desperate state of the economy. officials decry the protesters of counterrevolutionaries and supporters of the old mubarak regime. but protesters insist it is not about the past -- it is about the future. memo we only have one demand -- the regime should go because they have done nothing for us. >> secularist and liberals say the government has betrayed the revolution. >> for the latest, let's go now to our correspondent in cairo. what is the latest you can tell us from where you are? >> i was this morning at the court where there was celebration by the relatives of the people who died after 21 people were sentenced to death, mainly fans of the port said club, but at the same time, riots broke our in the city of port said when people tried to storm the prison where most of the ones which are sentenced, and until now, -- the number is rising by the minute, but until now, we have confirmed 16 dead people in this riot. >> 21 people have been sentenced to death. 52 people still to be sentenced. tell us more about that. >> that is one of the interesti
Search Results 0 to 2 of about 3